Unless I want to drill into my roof (which I absolutely do not!), I'm not sure there are any footings available other than the offical Mopar ones that come with the utility bar kit... which are actually made by Thule.

The footings/bars alone aren't prohibitively expensive, it's the bars + racks for 3 bikes, and it starts getting up there I could probably do the bars after next week, but any racks would have to wait..